Bad Battery?

[dirtwarrior]

asking for a friend
Would a larger side post battery fit?

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[HKusp]

asking for a friend
Would a larger side post battery fit?

It depends on the dimensions and you have to change the connections. It'd be kind of a PIA to set it up, but once you did, it might pay some dividends.

 

[scooter13]

My tender is connected to the + and - terminals of the battery. Is this confusing the BMS. I always do the BMS reset as suggested in your link after unplugging the tender.

I had the same question. I will be putting a tender on my 2020 gt350 for winter and want to know if I can ground it onto a ground wire that is atop the pass side strut coming out of the fuse box located there. It would be convenient but with all the electronics on new cars I don't want to mess anything up.

 

[Postal Bob]

I had the same question. I will be putting a tender on my 2020 gt350 for winter and want to know if I can ground it onto a ground wire that is atop the pass side strut coming out of the fuse box located there. It would be convenient but with all the electronics on new cars I don't want to mess anything up.

That is fine, and probably the easiest way to do it. Has worked for me for years.

 

[scooter13]

That is fine, and probably the easiest way to do it. Has worked for me for years.

Thanks. That's exactly what I want to do.

 

[Buldawg76]

Just make sure to put the tender lead on top of the negative battery terminal so you keep the negative cable touching the strut tower itself like in the pic not the other way with tender terminal touching the strut tower.

BD

 

[Skye]

I noted two topics questions were being asked of:

1. connecting tenders directly to the battery
2. load shedding

Attached is a link to a document which could help.

With respect to Q1, on the negative battery cable, there is a Hall Effect sensor; this is what the Body Control Module (BCM) uses to monitor the battery when it is discharging and as it is being charged. If a tender is directly on the (-) battery post, the BCM sees that as the battery is discharging and becomes confused or disoriented. Maybe load-shedding will be implemented. Maybe the alternator will be asked to supply even more power to the battery. IDK. Ford recommends a chassis ground.

https://www.mustang6g.com/forums/threads/batter-tender-battery-connection.172738/

With respect to Q2, yes, Ford uses a load-shedding strategy, where specific features are disabled to save the battery or the charging system. At one end of the spectrum, certain things are temporarily disabled in the background. At the other, features (things often involving electricity, like heated steering wheels and defrost) are turned down.

https://www.mustang6g.com/forums/threads/s550-electronic-modules-and-their-networks-a-primer.195769/

See the post related to the S550 charging system, batteries, etc.

 

[Buldawg76]

I noted two topics questions were being asked of:

1. connecting tenders directly to the battery
2. load shedding

Attached is a link to a document which could help.

With respect to Q1, on the negative battery cable, there is a Hall Effect sensor; this is what the Body Control Module (BCM) uses to monitor the battery when it is discharging and as it is being charged. If a tender is directly on the (-) battery post, the BCM sees that as the battery is discharging and becomes confused or disoriented. Maybe load-shedding will be implemented. Maybe the alternator will be asked to supply even more power to the battery. IDK. Ford recommends a chassis ground.

https://www.mustang6g.com/forums/threads/batter-tender-battery-connection.172738/

With respect to Q2, yes, Ford uses a load-shedding strategy, where specific features are disabled to save the battery or the charging system. At one end of the spectrum, certain things are temporarily disabled in the background. At the other, features (things often involving electricity, like heated steering wheels and defrost) are turned down.

https://www.mustang6g.com/forums/threads/s550-electronic-modules-and-their-networks-a-primer.195769/

See the post related to the S550 charging system, batteries, etc.

My EcoBoost premium also has a hall effect sensor on the positive cable between where it is connected to the under hood fuse box and battery post.

I have my tender leads connected to the negative at the strut tower and the positive at the under hood fuse box positive cable connection so the BMS sees both positive and negative readings if that actually makes any difference.

BD

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